{"id":289560,"date":"2023-06-20T14:28:54","date_gmt":"2023-06-20T14:28:54","guid":{"rendered":"\/forum\/forums\/topic\/how-can-the-number-of-particles-in-a-parcel-can-be-less-than-1\/"},"modified":"2023-06-20T14:28:54","modified_gmt":"2023-06-20T14:28:54","slug":"how-can-the-number-of-particles-in-a-parcel-can-be-less-than-1","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-can-the-number-of-particles-in-a-parcel-can-be-less-than-1\/","title":{"rendered":"How can the ‘number of particles’ in a parcel can be less than 1 ?"},"content":{"rendered":"

I’m running a unsteady 2d axisymmetry DPM model. I’m employing a surface injection. A mass flow rate of 0.0166 kg\/s, with particle size of 500microns, and density 3850 kg\/cu.m, is used. The surface of injection is spread across 12 cells. And the timestep size is 1e-5 s. When I calculated the number of particles in a parcel, I got a fractional value (~0.05). <\/p>\n

Even though this is a numerical value, how can this be less than 1. Some question which I have are mentioned below;<\/p>\n

    \n
  1. How will the equations be solved computationally? <\/li>\n
  2. The new injections what I see at every timestep, is it corresponding to the parcel or particle?<\/li>\n
  3. Another general ambiguity is? Why ANSYS fluent interchanges the term ‘parcel’ and ‘particles’. Please find the attached example images below. The first one was obtained whilst loading the loading data file, whereas the second obtained via tui command ‘report > particle-summary’. Which one of these is the actual number of particles?<\/li>\n<\/ol>\n

    Image 1 – obtained whilst loading data file.<\/p>\n

    <\/p>\n

    Image 2 obtained using tui command. <\/p>\n

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